1. Johnson LA. Fertility results using frozen boar spermatozoa: 1970–1985. In: Johnson LA, Larsson K, editors. Deep freezing of boar semen. Uppsala: Swedish University of Agricultural Sciences; 1985. p. 199–222.
2. Recent developments and concepts in the cryopreservation of spermatozoa and the assessment of their post-thawing function;Watson;Reprod. Fertil. Dev.,1995
3. The effects of low temperature and acclimatisation on the respiratory activity and survival of ram spermatozoa;Chang;Proc. R. Soc. Ser. B,1940
4. Cryopreservation of mammalian sperm: what we ask them to survive;Hammerstedt;J. Androl.,1990
5. Mazur P. Physical and chemical basis of injury in single-celled micro-organisms subjected to freezing and thawing. In: Meryman HT, editor. Cryobiology. London: Academic Press; 1966. p. 213–315.